French arête in the sense of "ridge" comes from Old French areste and Latin arista "bristle, fishbone", whose etymology is unclear [1] (Etruscan has been someti

French arête in the sense of "ridge" comes from Old French areste and Latin arista "bristle, fishbone", whose etymology is unclear [1] (Etruscan has been sometimes proposed, among other hypotheses), but which is certainly not related to Greek arete. [1] https://en.wiktionary.org/wiki/arista#Latin https://en.wiktionary.org/wiki/arista#Latin